AJL Electronics
Active member
Title is wrong, it should read Teensy 3.6 and Revision C audio board!
Very strange this one, to me...
I am building the PD0LEW RTTY decoder https://sites.google.com/view/pd0lew/projects/rtty The code is too big for the forum, which is why I didn't post it here.
I have it built on a breadboard with the modules in line and solid wire interconnects between them of maybe four inches or so. Although it appeared to be receiving data, the output was a garbled mess, no relationship to what was being fed to it, in either polarity. My idea was that maybe the clocks didn't like the wire length, so I reconnected everything closer, but left the wire lengths as they were, but not parallel with each other. I then started getting 50% decoding accuracy.
My next step was to solder headers to the Teensy and plug the audio board directly on top. All my soldering was accurate and I have inspected it with a magnifying glass to double check. With the boards so coupled, I get nothing whatever, even the tuning indicator doesn't move. That suggests to me that the audio board is not passing data to the Teensy.
All Voltages check out and I can see the clocks where they should be.
Does anyone have a simple answer please? These photos are of the original construction when I got 0% accuracy. It was late last night when I got the issues, so gave it up to think about it a bit. I have no photos of the current build but will upload them later if useful.
Very strange this one, to me...
I am building the PD0LEW RTTY decoder https://sites.google.com/view/pd0lew/projects/rtty The code is too big for the forum, which is why I didn't post it here.
I have it built on a breadboard with the modules in line and solid wire interconnects between them of maybe four inches or so. Although it appeared to be receiving data, the output was a garbled mess, no relationship to what was being fed to it, in either polarity. My idea was that maybe the clocks didn't like the wire length, so I reconnected everything closer, but left the wire lengths as they were, but not parallel with each other. I then started getting 50% decoding accuracy.
My next step was to solder headers to the Teensy and plug the audio board directly on top. All my soldering was accurate and I have inspected it with a magnifying glass to double check. With the boards so coupled, I get nothing whatever, even the tuning indicator doesn't move. That suggests to me that the audio board is not passing data to the Teensy.
All Voltages check out and I can see the clocks where they should be.
Does anyone have a simple answer please? These photos are of the original construction when I got 0% accuracy. It was late last night when I got the issues, so gave it up to think about it a bit. I have no photos of the current build but will upload them later if useful.
Last edited: